How to increase BLE speed

[DongGeunShin]

Hi,

I am currently sending SAADC data from an nRF52840 to a smartphone using BLE notifications.
The SAADC is triggered by TIMER + PPI, and samples are collected into a buffer and sent periodically.

At around 1 kHz, it works relatively well, but when I try to increase the sampling/streaming rate, the BLE transmission becomes unstable.
My goal is to achieve stable BLE transmission at around 10 kHz, and I would like to know what kinds of settings or architecture changes are most effective for this.

For example, I would appreciate advice on which of the following should be prioritized:

• connection interval
• MTU / data length
• PHY
• notification sending method
• buffering structure

Thanks.

[Vidar Berg]

Hello,

I quickly made a small demo sample with good help of my coding agent that demonstrates how you can transmit 10k samples per second. Please review this and see if a similar approach may work for your project.

From the log you should see these connection parameter updates:

6254.saadc_test.zip

Best regards,

Vidar